Motorcycle braking device

Abstract

The present invention provides a motorcycle braking device which can perform a control which does not give discomforts to a rider in a front and rear wheel interlocking brake control by taking a manipulation of the rider into consideration. In the motorcycle braking device according to the present invention, in a front and rear wheel interlocking brake control, an additional target pressure associated with a brake input pressure of one of a front wheel hydraulic circuit and a rear wheel hydraulic circuit is applied to another wheel driven by the front wheel hydraulic circuit or the rear wheel hydraulic circuit.

1. A motorcycle braking device comprising: a front wheel hydraulic circuit; a rear wheel hydraulic circuit and a control part which controls the front wheel hydraulic circuit and the rear wheel hydraulic circuit; the control part performing a both wheel interlocking brake control such that a braking force to a wheel generated by the front wheel hydraulic circuit and a braking force to a wheel generated by the rear wheel hydraulic circuit are interlocked with each other, wherein
 the control part measuring a first brake pressure generated by one of the front wheel hydraulic circuit and the rear wheel hydraulic circuit and applied to a first wheel, 
 the control part determining a target pressure to be generated by the other of the front wheel hydraulic circuit and the rear wheel hydraulic circuit for a second wheel, the target pressure associated with the brake pressure applied to the first wheel, 
 the control part measuring a second brake pressure generated by the other of the front wheel hydraulic circuit and the rear wheel hydraulic circuit and applied to the second wheel, and 
 the control part applying a third brake pressure to the second wheel when the target pressure is larger than the second brake pressure, the third brake pressure obtained by subtracting the second brake pressure from the target pressure. 
 
     
     
       2. The motorcycle braking device according to  claim 1 , wherein said first wheel is the rear wheel. 
     
     
       3. The motorcycle braking device according to  claim 1 , wherein the second wheel is the front wheel. 
     
     
       4. The motorcycle braking device according to  claim 1 , wherein the target pressure is modified by taking a traveling state of a vehicle body into consideration. 
     
     
       5. A motorcycle braking device comprising:
 a front wheel hydraulic circuit including a first brake manipulation device which is manipulated by a rider for braking a front wheel, a first master cylinder which generates a pressure corresponding to a manipulation of the first brake manipulation device, a first master cylinder pressure sensor which detects a pressure of the first master cylinder, and a first wheel cylinder which brakes the front wheel using the pressure of the first master cylinder; 
 a rear wheel hydraulic circuit including a second brake manipulation device which is manipulated by a rider for braking a rear wheel, a second master cylinder which generates a pressure corresponding to a manipulation of the second brake manipulation device, a second master cylinder pressure sensor which detects a pressure of the second master cylinder, and a second wheel cylinder which brakes the rear wheel using the pressure of the second master cylinder; and 
 a control part which controls the front wheel hydraulic circuit and the rear wheel hydraulic circuit, the control part
 measuring a first brake pressure generated in one of the front wheel hydraulic circuit and the rear wheel hydraulic circuit by the rider using the first or second master cylinder pressure sensor, 
 measuring a second brake pressure generated in the other of the front wheel hydraulic circuit and the rear wheel hydraulic circuit by the rider using the first or second master cylinder pressure sensor, 
 determining an additional target pressure associated with the first brake pressure, the additional pressure being the difference between a target pressure and the second brake pressure when the target pressure is greater than the second brake pressure, the additional pressure being zero when the target pressure is less than the second brake pressure, and 
 applying the additional target pressure to the front or rear wheel by the other of the front wheel hydraulic circuit and the rear wheel hydraulic circuit. 
 
 
     
     
       6. The motorcycle braking device according to  claim 5 , wherein said first brake pressure is generated by the rear wheel hydraulic circuit. 
     
     
       7. The motorcycle braking device according to  claim 5 , wherein the brake pressure is a pressure of the second master cylinder of the rear wheel hydraulic circuit or a pressure of the second wheel cylinder of the rear wheel hydraulic circuit. 
     
     
       8. The motorcycle braking device according to  claim 5 , wherein the second brake pressure is generated by the front wheel hydraulic circuit. 
     
     
       9. The motorcycle braking device according to  claim 5 , wherein the additional target pressure is modified by taking a traveling state of a vehicle body into consideration.